Technical Mallory distributor ID

I've got a Mallory dual point distributor that is rebuilt. I'd like to figure out what it fits for certain and make sure I can't use it before I get rid of it. Has had numbers stamped over the tag numbers, but originally read ZB 270AX. I have seen some reference to ZC 270 as fitting 315 and 325 Dodge tall deck hemi and poly, and this is a Mopar distributor for certain, but just want to be sure.

I can't post pictures from my phone, but I can post some later after work. Has the two piece brown cap.

Thanks for any help.

Dave

 

Here's what I came up with. 270A-X fits a 1951-'58 Dodge/Chrysler/DeSoto 314-354 CID Hemi with right hand rotation. ZC states that it should have both vacuum and centrifugal advance. Hope this helps.

 

Hmm, forgive my ignorance, but what is meant by right hand rotation?

I was told by an expert that this distributor was opposite rotation of Desoto hemi. If it's same, I'll keep it and modify the shaft length to work, but if it's opposite, I'll get rid of it.
I tried doing some research on it last night, but didn't get far with it.

This one is a ZB, and has no vacuum advance, just mechanical.

 

Right hand rotation is the direction the distributor spins. Here is the sheet I used for the info I sent.

 

I guess I should have worded that differently. I do know that the RH rotation referred to the rotation direction of the distributor, but I guess what I wasn't sure of, is that considered clockwise rotation?

 

Eagerly awaiting the results, as I've had trouble confirming one for my 330 Desoto. Thanks for posting the chart, olskool!

 

My original AutoLite distributor out of the Desoto is apparently being held hostage, so I don't have anything to compare this one to. All I can say with certainty, when I drop this one into the engine, the shaft seems to stop it from seating on the block by a 1/4" or so. It's a 1956 341, though my knowledge of hemi engines and the differences between Dodge, Chrysler, Plymouth and Desoto and the various CID differences is nearly nonexistent.
And thank you for posting the chart, I appreciate it.

 

Lots of consternation for something that is easily found out by just moving the point plate manually, if the rotor will move to the right in relationship to the point plate it is for a distributer then normally turns clockwise and if it moves to the left in relation to the point plate it is for a distributer that normally turn counter clockwise.

If you don't know the distributer rotation for your particular engine, ant motor's or Chilton's manual that covers your engine will show you distributer rotation for your engine.

 

PnB, the distributor I have is clockwise rotation, I do know that, but I thought my Desoto hemi was as well. So, without my autolite here to check, just wanted confirmation.

 

Desoto hemi, and MOPAR 318 and Chevrolet all rotate clockwise.

A cheap trick, look at what side of the cam shaft the distributer is on, if it is to the left of the cam shaft it rotates clockwise.

NOTE: disclaimer a reverse rotation boat motor will be opposite.

 

Thanks for the info, PnB. While curious as to the original application of this Mallory, I don't particularly need to know. More just wanted someone more knowledgeable to confirm or refute what I had been able to ascertain about this distributors rotation being the same as Desoto. Guess I'll keep it and maybe look into one of the HotHemiHeads adapter shafts if there's one available for this particular fitment issue.
I had read of some issues with the HHH shafts not being up to task and failing, anyone have experience with them, good bad or otherwise?

 

Picture of the distributors fit into the block.